An inflammatory lung disease caused by regular inhalation of fungi living inside bagpipes.

In 2014, a 61-year-old man died after seven years of a mysterious illness that left him breathless, with a dry cough.

Doctors diagnosed him with hypersensitivity pneumonitis, a rare disease caused by breathing in particles that irritate lung tissues. It’s also known as bird fancier’s lung, humidifier lung and hot tub lung, among other names. But the patient had no known exposure to birds, nor to household molds that can trigger the disorder.